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Re: Readu, Writeu Causing Segmentation Fault [message #67902 is a reply to message #67899]

Mon, 07 September 2009 01:29

Wout De Nolf
Messages: 194
Registered: October 2008

Senior Member

On Sun, 6 Sep 2009 21:21:28 -0700 (PDT), "A.R." <alromens@gmail.com>
wrote:

> Hello everyone,
>
> I have created rather large volumes (3-D binary arrays) in IDL that I
> save as unformatted data (i.e. writeu). When the volume gets above a
> certain size (around 2.2 GB) when I attempt to writeu or readu the
> volume, I am kicked out of IDL with a segmentation fault. I don't
> think it's a memory issue, I'm running 64-bit IDL on a 64-bit linux
> running redhat enterprise with 12 GB of ram.
>
> One workaround I've used for 'writeu' is to write to the file in
> chunks, by using a for loop to write each slice of the volume
> individually. This works for saving the volume, but then I have no
> way to re-open the volume in IDL without the readu segmentation fault!
>
> Anyone have any ideas for what could be causing this? I'm running IDL
> Version 6.2.
>
> I appreciate any suggestions/ideas you smart people might have! In
> the meantime, I'll continue banging my head against the wall over this
> one.

This works for me:
IDL> writeu,lun,lonarr(930,930,930) ;~3GB

{ x86_64 Win32 Windows Microsoft Windows 7.1 Apr 21 2009 64 64}

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[Message index]

		Re: Readu, Writeu Causing Segmentation Fault By: A.R. on Wed, 09 September 2009 14:41
		Re: Readu, Writeu Causing Segmentation Fault By: penteado on Mon, 07 September 2009 08:51
		Re: Readu, Writeu Causing Segmentation Fault By: Wout De Nolf on Mon, 07 September 2009 01:29
		Re: Readu, Writeu Causing Segmentation Fault By: Maarten[1] on Mon, 07 September 2009 01:10
		Re: Readu, Writeu Causing Segmentation Fault By: Wout De Nolf on Fri, 11 September 2009 01:51
		Re: Readu, Writeu Causing Segmentation Fault By: Jean H. on Thu, 10 September 2009 04:39

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